5-MeO-MiPT is an extremely diverse drug. If it works with your body and mind it is truly great.
I've found Loperamide will very effectively prevent any gastrointestinal problems that could really turn a good trip very bad.
For me, low doses (1-3mg) provide a very relaxed - almost sleepy - experience that's very conductive for talking and free thinking without much, if any confusion! Virtually no ill-effects at this dose either. There's no very apparent come-up or down and it's really kind of difficult to know how long it really lasts...
Medium doses (3-8mg) provide a totally different trip. It's almost like a different drug. It starts becoming slightly stimulating in nature - but very different from the familliar stimulation felt from the 2C-x and DOx drugs. Uplifting emotions, though not forced like with the MDxx drugs flow. Trippy thoughts and creative actions come easily. A trip that is easy to make of it what you will. Side effects are very mild if any at all (muscle/jaw tension, insomnia).
High doses (8mg+) are also not anything like the lower ones. This drug hits FAST. The FASTER it hits you the better. This is for sure a drug you want to take on an empty stomache! It drastically changes the effect. A gradual come-up with high doses is undesirable and leaves you wanting MORE, but redosing is not advised.
The onset is very intense. Overwhelming. Can be nauseating, but the feeling passes. Very stimulating, extremely euphoric feelings come in waves. Other people have said this, and I feel it's accurate - Tryptamine Roll. Dancing to very loud music can really be great if you're in to that. This drug is very stimulating in higher doses. Usually need to find some way to move around because it feels so good. Depending on dose the Roll phase of the trip lasts from around 3-5 hours.
One thing I absolutely love about 5-MeO-MiPT is when the rolling part is over, there is no sad awful gut-wrenching feeling that the good feeling you had earlier is gone.
Then it gets trippy. Like really out there, esp. with 14mg+ just overkill depending on your reasons for taking the drug in the first place. And if you redosed during the 'roll' part trying to feel more euphoric - hahahah oh man you're in for it. Extremely difficult to convey what it's like with words. This 2nd part of the trip can persist and be very strong for hours depending on dosage.
High dosage side effects other than nausea can be muscle tension, jaw clenching.
Diarrhea is a risk at any dose, I just take Loperamide every time prior to dosing as a preventative measure.